help: electrical problems, 93 Saturn SL2

Discussion in 'Saturn S-series' started by J.B. Bobbitt, Feb 24, 2005.

  1. J.B. Bobbitt

    J.B. Bobbitt Guest

    Most of the time it runs fine.

    If she leaves the rear defroster on and turns the key off, the battery goes

    Sometimes, after the car starts normally, the aftermarket CD player/radio
    blinks on/off, the lights and gauges dim or go out, and after she turns the
    key off, the battery is dead.

    I recharge the battery and it ususally starts and runs fine. For a while.


    1. Any immediate diagnoses or quick fixes?
    2. Is this something that can be diagnosed with a fancy scanner or computer
    or electrrical gizmo?

    As always, thanks a heap,
    J.B. Bobbitt, Feb 24, 2005
  2. J.B. Bobbitt

    blah blah Guest

    First thing a technician looks for is "Previous Work"... Who ever
    installed the aftermarket radio has very likely screwed something up.
    blah blah, Feb 24, 2005
  3. J.B. Bobbitt

    Jim, N2VX Guest

    Are the metal portions of the body/chassis starting to rust? The
    problems you describe can happen when there are bad ground
    connections. Use a meter to check for a voltage drop from battery
    minus terminal to engine block to various points on the body with the
    engine and accessories running. I would be concerned with any
    readings over .2 volt.

    Also an excessive voltage drop from the alternator to battery will
    prevent the battery from charging as it should.

    I had this happen on a car that was rusting out. Dashboard lights
    would flicker, battery liked to go dead, etc. Fixed it by running
    extra ground wires from the battery to engine to alternator frame to
    various points on the body. Worked fine after that.

    Good luck,
    Jim, N2VX, Feb 25, 2005
  4. Alternator ?
    justastreekin, Feb 26, 2005
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